Fixed that for you. It's amazing how much better the standard of driving is when there's a marked police car about, the police car turns off the road & the standard of driving instantly gets much worse. I've witnessed this many times. So no, unmarked police cars & lots of them. That way people end up having drive to their 'best behaviour' standard because virtually every newish car they see might be a police car
Naughty...
You can't have unmarked Police Cars either
The use of unmarked Police cars is entrapment
Unmarked Police Cars are only hidden to catch otherwise law abiding motorists and etort money. Also ther is the problem wher thes motorists have to divert their attention way from the road watching for unmarked Police Cars making accidents more likely.
Secondly there is the panic braking that occurs when motorists see the uniformed driver of an unmarked vehicle which also causes accidents.